40178803457 has 4 divisors (see below), whose sum is σ = 43269480660. Its totient is φ = 37088126256.

The previous prime is 40178803439. The next prime is 40178803499. The reversal of 40178803457 is 75430887104.

It is a happy number.

40178803457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25673973361 + 14504830096 = 160231^2 + 120436^2 .

It is a cyclic number.

It is not a de Polignac number, because 40178803457 - 2⁶ = 40178803393 is a prime.

It is a super-2 number, since 2×40178803457² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40178803057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1545338582 + ... + 1545338607.

It is an arithmetic number, because the mean of its divisors is an integer number (10817370165).

Almost surely, 2^40178803457 is an apocalyptic number.

It is an amenable number.

40178803457 is a deficient number, since it is larger than the sum of its proper divisors (3090677203).

40178803457 is a wasteful number, since it uses less digits than its factorization.

40178803457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090677202.

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 40178803457 in words is "forty billion, one hundred seventy-eight million, eight hundred three thousand, four hundred fifty-seven".